NEW FOR 2018 Featuring a waterproof valve that purges trapped air, our versatile Blocker PurgeAir Dry Sack resists ballooning to help maximize use of space within a pack or bag. Plus, the fully waterproof construction ensures essential contents are protected. Versatile materials: Lightweight 70D polyurethane-coated nylon materials are a tougher, more resilient cousin to the ultralight BlockerLite materials. More durable and versatile, these materials are great for all-around use with confident waterproof protection. PurgeAir™-equipped: Our unique and waterproof PurgeAir valve vents trapped air, helping the sack compress further after being sealed, and is both more durable and more reliably waterproof than waterproof/breathable fabric membranes. Waterproof closure: Roll-top closure features a wrinkle-free stiffening strip to ensure a secure seal when closing the dry sack. Durable construction: Fully welded seams result in stronger and more durably protective construction compared to sewn-and-taped seams. Efficient-Packing: PackTight™ packing system sacks feature flat-sided, rectangular shapes that nestle closely together, packing 20% more efficiently than rounded sacks for easy, space-saving organization. Weight 2.5 oz, width 4.7 in, length 9.2 in, height 16.1 in, volume 915 cu.in. PVC-free. Made of 70D polyurethane-coated nylon. Roll-down closure. Made in China.
I use this bag every time I go backpacking now. Usually for my set of dry/camp clothes, which has turned out to be a necessity for shoulder season trips in the Pacific Northwest and for a longer circuit I recently did in Chile. It's held up great and I don't mind putting in a little extra elbow grease for the AirPurge since it helps me use space efficiently. This is a heavier option than the BlockerLite but I like that it's more durable as well, so both have their pros!